Motorola MVME956AC, MVME956UM2 User Manual

MVME956A C VME Chassis

User’s Manual

MVME956ACA/UM2

Notice

While reasonable efforts have been made to assure the accuracy of this document,
Motorola, Inc. assume s no liabi lity re sulting fr om any omi ssions i n this doc ument, or fr om
the use of the information obtained therein. Motorola reserves the right to revise this
document and to make ch ange s fr om ti me t o ti me in the content hereof without ob li ga ti on
of Motorola to notify any person of such revision or changes.

No part of this mater i al may be reproduced or copied in any tangible medium, or st ore d i n
a retrieval system, or transmitted in any form, or by any means, radio, electronic,
mechanical, photocopying, recording or facsimile, or otherwise, without the prior written
permission of Motorola, Inc.

It is possible that this pu blicati on ma y cont ain r eferenc e to, or i nformat ion a bout Mot oro la
products (machines and programs), programming, or services that are not announced in
your country. Such reference s or informat ion must not be cons trued to mea n that Motorol a
intends to announce such Motorola products, programming, or services in your country.

Restricted Rights Legend

If the documentation contained herein is supplied, directly or indirectly, to the U.S.
Government, the following notice shall apply unless otherwise agreed to in writing by
Motorola, Inc.

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013.

Motorola, Inc.

Computer Group

2900 South Diablo Way

Tempe, Arizona 85282

Preface

The MVME956AC VME Chassis User’s Manual describes the installation, configuration,
and operation of the Model MVME956 chassis. This chassis is a member of a family of
system enclosures that are configurable with a variety of card cage, storage drive, and AC
power supply options. The MVME956AC is a 12-slot model designed for rack-mount or
lab benchtop applications. The manual supplies general information on the chassis,
instructions for its preparation and installation, and support information.

This manual is intended for an yone who wants to design OEM systems, supply additional
capability to an e xisting system, or u se the equipment in a lab env ironment for ex perimental
purposes.

A basic knowledge of computers and digital logic is assumed.
Technical knowledge of energy and voltage hazards present in line connected electronic

equipment is assumed.
T o use this manua l, you may need to be f amiliar with the publ ications listed in the followi ng

Related Documentation section.
If any modifications are made to a MVME956AC chassis, the modifier assumes

responsibility for radio frequency interference issues. If any payload installed in a Model
MVME956AC system is not totally s upported by Motorola, the integrator assumes
responsib ility for radi o frequency interference.

Motorola® and the Motorola symbol are registered trademarks of Motorola, Inc.
All other products mentione d in t his document are trademarks or regi st er ed trademarks of

their respective holders.

© Copyright Motorola, Inc. 1997, 1998

All Rights Reserved

Printed in the United States of America

October 1998

Safety Summary

Safety Depends On You

The following general s afet y prec au tions m us t be ob served dur ing al l phas es of ope ration , ser vice , and r ep air of th is
equipment. Fail ure to compl y with these pr ecautions or with spec ific wa rnings els ewhere i n this manual violates s afety
standards of design, manufacture, and intended use of the equipment. Motorola, Inc. assumes no liability for the
customer’s failure to comply with these re qu irements.

The safety precautio ns listed bel ow repr esent warnin gs of certain dangers of whi ch Motorola is aware. You, as the user
of the product, shou ld fol low these war nings a nd all o ther safe ty preca ution s necess ary for the saf e operat ion of the
equipment in your operating environment.

Ground the Instrument.

To minimiz e shock hazard, the equipment chassi s and enclosure must be connected to an e le ct rical ground. Both AC
and DC versions of this equipment require a three-conductor power cable. A supplementary chassis ground is also
provided. AC power cables must b e plugged into an approved three-contact electri cal outlet. The power jack and
mating plug of the power cable must meet International Electrotechnical Commission (IEC) safety standards.

Do Not Operate in an Explosive Atmosphere.

Do not operate the equipment in the presence of flammable gases or fumes. Operation of any electrical e qui pment in
such an environment cons titutes a definite safety hazard.

Keep Away From Live Circuits.

Operating personnel must not remove equipment covers. Only Factory Authorized Service Personnel or other
qualified maintenan ce pers on nel may remove equi pm ent covers fo r int ernal su bass emb ly or com pon en t replac em ent
or any internal adjustment. Do not replace components with power cable connected. Under certain conditions,
dangerous voltages may exist even with t he power cable removed. To avoid injuries, always disco nnect power and
discharge circuit s before touching t hem.

Do Not Service or Adjust Alone.

Do not attempt internal service or adjustment unle ss another person capable of rendering first aid a nd resuscitation is
present.

Use Caution When Exposing or Handling CRTs.

Breakage of a Cathode-Ray Tube (CRT) causes a high-velocity scattering of glass fragments (implosion). T o prevent
CRT implosion, avoid rough handling or jarring of the equipment. CRTs should be handled only by qualified
maintenance per sonnel using approved safety mask and gloves.

Do Not Substitute Parts or Modify Equipment.

Because of the dan ger o f introd ucing ad ditio nal haz ards, d o not i nstall s ubstitu te part s or per form any u nauth orized
modification of the equipment. Contact your local Motorola representative for service and repair to ensure that safety
features are maintained.

Dangerous Procedure Warnings.

W arnings, such as the exampl e below, precede potentially dangerous proce dures throughout this manual. Instructions
contained in the warnin gs must be followed. You should also employ all other safety precau tions which you deem
necessary for the operation of the equ ipment in your oper at in g environment.

Dangerous voltages, capable of causing death, are present in

!

WARNING

this equipment. Use extreme caution when handling, testing,
and adjusting.

!

WARNING

Regulatory Notices

Changes or modifications not expressly approved by

Motorola Computer Group could void the user’s authority to
operate the equipment.

Use only shielded cables when connecting peripherals to
assure that appropri ate radio frequenc y emissions complia nce
is maintained.

FCC (U.S.)

Both Class A (commercial) and Class B (residential) digital
devices have the following Federal Communications
Commission (FCC) wording on the regulatory label:

This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1) this
device may not cause harmfu l interference, and ( 2) this device
must accept any interferen ce recei ved, inclu din g interf erenc e
that may cause undesired operation.

In addition, Class B equipment will also have an FCC ID
number displayed such as: FCC ID: LNT6ØØADT. To
determine the classification of your equipment, examine the
FCC labels, which are readily visible on the exterior of the
cabinets (usually on the back or bottom). If all labels have
Class B ratings, the system is Class B. Any Class A label
makes the system Class A.

For FCC Class A
NOTE: This equipment has been tested and found to comply

with the limits for a Class A dig ital device, pursuant to part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio
communications. Operati on of th is equi pmen t in a res ident ial

area is likely to cause harmful interfer enc e, in which case the
user will be required to correct the interference at his own
expense.

Industry Canada

The classification of your system for Industry Canada can be
determined by examining the regulatory labels, which are
readily visible on the exterior of the cabinets (usually on the
back or bottom). If all labels have Class B ratings, the system
is Class B. Any Class A label makes the system Cla ss A. The
following wording in En glish or Fre nch or both, i ndicat es th e
Classification .

This Class A digital apparatus meets all requirements of the
Canadian Interference-Causing Equipment Regulations.

Cet appareil numérique de la classe * respecte toutes les
exigences du Règlement sur le matériel brou il le ur du Canada.

CE Notice (European Community)

Marking a system with the “

“ symbol indicates

compliance of that Motorola system to the EMC and Low
Voltage directives of the European Community. A system
with the CE markin g meets or exce eds the following technical
standards:

EN 55022 “Limits and methods of measurement of radio
interference characteristics of information technology
equipment.”

EN 50082-1 “Electromagnetic compatibility - Generic
immunity standard Pa rt 1: Resi dential, commercial, and light
industry.”

IEC 801-2 “Electromagnetic compatibility for industrial
process measurement and control equipment Part 2:
Electrostatic discharge requirements.”

IEC 801-3 ”Electromagnetic compatibility for industrial
process measurement and control equipment Part 3:
Radiated electromagnetic field requirements.”

IEC 801-4 “Electromagnetic compatibility for industrial
process measurement and control equipment Part 4:
Electrical fast transient/burst requirements.”

EN 60950 “Safety of information technology equipment,
including electrical business equipment.”

In accordance with European Community directives, a
“Declaration of Conformity” has been made and is on file at
Motorola, Inc. – Computer Group, 27 Market Street,
Maidenhead, United Kingdom, SL6 8AE.

In addition to the above standards, this system has also met the
requirements of the following European standards:

EN 60555-2 “Disturbances in supply systems caused by
household appliances a nd similar electrica l equipment Part 2:
Harmonics.”

EN 60555-3 “Disturbances in supply systems caused by
household appliances a nd similar electrica l equipment Part 3:
Voltage fluctuations.”

Contents

CHAPTER 1 General Information

Overview....................................................................................................................1-1

Features......................................................................................................................1-1

General Description ...................................................................................................1-2

Chassis Description and Specifications..............................................................1-3

Power Supply Description and Specifications....................................................1-4

Power Supply Limit Considerations............................................................1-5

VME Bus Backplane Description and Specifications ........................................1-5

Safety and Regulatory Compliance............................................................................1-6

General Precautions ...................................................................................................1-7

Operating Environment..............................................................................................1-7

Chassis Cooling Considerations ................................................................................1-8

Hardware Preparation ................................................................................................1-9

Related Documentation............................................................................................1-10

CHAPTER 2 Chassis Mount Options

Overview....................................................................................................................2-1

Chassis Installation Instructions ................................................................................2-1

Benchtop Operation............................................................................................2-1

Install the Desktop Cover Kit.....................................................................2-2

Rack Mounting Option .......................................................................................2-4

CHAPTER 3 Operating Procedures

Overview....................................................................................................................3-1

Controls and Indicators..............................................................................................3-1

Power Control Procedure........................................ ...... ...... .......................................3-2

CHAPTER 4 12-Slot VMEbus Backplane

Overview....................................................................................................................4-1

Physical Description .......................................... ..... ...... .............................................4-1

Backplane Power........................................................................................................4-1

Backplane Bus Connectors.................................................................................4-2

ix

VME64x Bus Interface Signal Termination .......................................................4-2

Backplane Preparation...............................................................................................4-3

Install the Daisy-Chain Jumpers................................................................................4-5

Pin Assignments.................................................................................................4-6

Power Monitor Connection.........................................................................4-6

Live Insertion..............................................................................................4-7

CHAPTER 5 Removal and Replacement Procedures

Overview....................................................................................................................5-1

Following ESD and Safety Procedures......................................................................5-1

Power Supply................................................... ...... ..... .............................................. .5-2

Removal.............................. ..... ...... ............................................. ...... ..... .............5-2

Replacement................. ...... ............................................. ..... ..............................5-4

Disk and Tape Drive..................................................................................................5-6

Removal..............................................................................................................5-6

Replacement.......................................................................................................5-7

VME64x Bus Backplane...........................................................................................5-9

Removal..............................................................................................................5-9

Replacement.....................................................................................................5-11

Cooling Fan .............................................................................................................5-12

Removal............................................................................................................5-12

Optional Air Filter Kit.............................................................................................5-14

Replacement.....................................................................................................5-14

CHAPTER 6 Support Information

Introduction ...............................................................................................................6-1

Drawings/Wiring Diagram ........................................................................................6-1

Parts Lists ..................................................................................................................6-2

x

List of Figures

Figure 2-1. Cover Kit.................................................................................................2-3

Figure 4-1. 12-Slot Backplane Connectors and Headers Rear View .........................4-4

Figure 4-2. Backplane Daisy-Chain Jumper Wiring..................................................4-8

Figure 5-1. Power Supply Removal/Replacement.....................................................5-4

Figure 5-2. Disk/Tape Drive Removal.....................................................................5-7

Figure 5-3. Backplane Mounting (Card File Removed) ..........................................5-10

Figure 5-4. Cooling Fan Removal/Replacement..................................................5-13

Figure 6-1. MVME956AC Chassis Assembly, 1 of 2................................................6-5

Figure 6-2. MVME956AC Chassis Assembly, 2 of 2................................................6-6

Figure 6-3. MVME956AC Wiring Diagram..............................................................6-7

xi

List of Tables

Table 1-1. MVME956AC Chassis Specifications ....................................................1-4

Table 1-2. 12-Slot VME Bus Backplane Specifications ..........................................1-5

Table 1-3. Hardware Preparation Items .....................................................................1-9

Table 4-1. Power Monitor Connection .....................................................................4-6

Table 4-2. Live Insertion Connections................................................. ..... .................4-7

Table 6-1. MVME956AC Chassis Parts List ...........................................................6-2

Table 6-2. MVME956AC-AC Major Assemblies......................................................6-4

xiii

Overview

Features

1General Information

1

This manual provides general information, hardware preparation,
installation instructions, removal and replacement procedures for major
assemblies, operational information, parts lists, and diagrams for the
MVME956AC 12-slot chassis. Th rou ghout t he remainder of this manual,
this enclosure may be referred to as the MVME956AC, or simply as the
chassis.

The features of the MVME956AC chassis include:

❏ VME board injector features in front card cage
❏ Board slot keying
❏ Internationally approved 550 watt power factor corrected, wide

ranging power supply

❏ 12-slot, 64-bit, VME64X-compatible backplane with +5Vdc,

+12Vdc and -12Vdc power supplied

❏ Optional SCSI drive ki ts
❏ Electrostatic Discharge (ESD) hardening and Electromagnetic

Interference (EMI) shielding

❏ Forced air cooling for power supply, mass storage modules, and

VME modules

❏ Rear mounted card cage for 17 transition modules, connected by

cables to rear P2 connectors or P2 paddle boards

❏ Lab benchtop or rack-mount operation

Features of the 12-slot VME bus backplane include:

1-1

1

General Information

❏ Compatibility with standard VME (3-row) modules
❏ Compatibility with standard VME64x modules requiring only

+5Vdc, +12Vdc, and -12Vdc backplane power and no direct P2
transition module connections

❏ 12 VME slots (24 sockets, 160-pin IEC 1076-4_xxx, 2.54mm

receptacle connectors for VME modules)

❏ 64-bit address and data (P1 and P2)
❏ VME64x bus and VME64X bus termination
❏ 35 additional signal ground return
❏ 46 additional user-defined I/O pins
❏ Geographical addressing
❏ +5Vdc, +12Vdc, and -12Vdc power supplied
❏ +3.3Vdc power is not supplied

General Description

The MVME956AC chassis is designed for OEMs and other technical
professionals who wish to integrate individual VME module board-level
products into a complete, compact, self-contained microcomputer system,
including disk and/or tape dri ve units. This packaging des ign helps to best
meet your specific performance and installation requirements. Various
options to permit the convenient assembly of systems for custom
installation and/or application are possible.

The major asse m blies of the MVME956AC are:

❏ Chassis with card ca ge, power supply, backplane , power switch, and

cooling fans. Operates on 115/220 Vac input power.

❏ AC power supply, 550W, 115/ 230 Vac input (+5 Vdc , +12 Vdc, and

-12 Vdc). Includes cooling fan and housing with cables.

1-2 Computer Group Literature Center Web Site

❏ VME module backplane. Contains 12 connectors for P1 and P2 of

VME bus.

The basic chassis, power supply, and backplane are described in this
manual. The optional disk driv es, tape drives, and controller s are described
in their respective manuals or reference sheets. Refe r to the Related

Documentation on page 1-10 for additional information.

Chassis Description and Specifications

The MVME956AC chassis is designed for industry- st anda rd 3-row VME
modules and VME64X modules not requir ing +3.3 Vdc backpl ane power.
The chassis accommodates five additional peripheral drive and houses a
VME module card cage with 12 VME bus slots. The front panel opening
accommodates the five 5-1/4-inch, half-height SCSI peripheral devices.
The control for the chassis is an ON/OFF power switch.When the switch
is in the OFF position, power to the modules is removed but the primary
side of the power supply remains energized. Power is supplied by an
internal 550 watt wide- ranging power suppl y, which is mounte d vertically
toward the rear of the chas sis. There is provision for 17 r ear panel-mounted
80 mm interface modules.

General Description

1

Three DC-powered fans provide forced air cooling for the power supply,
mass storage enclosure , and VME modules. Convection cooling i s used for
the rear-mounted modules .

The rear of the chassis supp orts standard doubl e-high Eurocard panels and
80 mm modules such as MVME7XX series modules. Table 1-1 lists the
specifications for the MVME956AC chas sis an d power su pply . Table 1- 3
lists the specifications for the 12-slot backplane. Specifications for the
SCSI drives and VME modules used in the MVME956AC chassis are
given in their respective manuals or reference sheets. Refer to Related

Documentation on page 1-10 for information.

http://www.mcg.mot.com/literature 1-3

1

General Information

Table 1-1. MVME956AC Chassis Specifications

Characteristics Specifications

Dimensions

Width

(with front flange) 19.00 inches (482.6 mm)

(without front flange) 17.20 inches (436.8 mm)
Depth 19.02 inches (483.1 mm)
Height 12.22 inches (310.4 mm)
Weight 32 pounds (15 kg)

Input voltage 90-132/180-264 Vac
Input frequ ency 47 to 63 Hz
Input power 90-132 Vac or 180-264 Vac
Output voltages +5 Vdc @ 80A

+12 Vdc @ 10A (16A peak)

-12 Vdc @ 10A

Output power 550 Watts (max.)
Temperature (NOTE)

Operating 0 degrees C to 40 degrees C
Storage -40 degrees C to +60 degrees C

Relative humidity (NOTE) 20% to 80% (noncondensing)

Note Temperature and humidity limits are primarily determined

by the type of ta pe a nd d is k medi a t hat you expect to install .

Power Supply Description and Specifications

DC power is supplied by a 550-watt wide-ranging power supply. It is
mounted in a fan-cooled air duct assembly and installed in the rear of the
chassis behind the disk drives. The cooling fan runs constantly when the
power supply is plugged in.

1-4 Computer Group Literature Center Web Site

General Description

Power Supply Limit Considerations

The MVME956AC chassis is suppl ied with a 550-watt, 3-outpu t switching
power supply. The power s upply i s capab le of h igher output curre nts tha n
the interconnection to the backplane. As designed, the enclosure +5 Vdc
output is rated at 6 0 amperes, the + 12 Vdc output at 10 a mperes (16 peak) ,
and the -12 Vdc output at 10 amperes.

The current rating for each individual output must not be

!

Caution

exceeded, and the total power supply output power must not
exceed 550 watts. When calculating the 5-volt current,
remember to include the backplane termination resistors.

The system integr ator must ensure t hat the inst alled peripheral
devices and VME module set do n ot exceed the p ower suppl y
rating.

VME Bus Backplane Description and Specifications

1

The MVME956AC chassis contains one 12-slot, full 64-bit VME bus
backplane mounted to the l eft of the periphe ral device area . The backplane
can accommodate up to 12 VME modules. It uses all signal and power
lines for VME bus connectors P1 and P2.

Table 1-2. 12-Slot VME Bus Backplane Specifications

Characteristics Specifications
Power consumption

(without device
modules)

Connectors

Device sockets

http://www.mcg.mot.com/literature 1-5

5W (1.0 A max @ +5V), required by active
termination

24 sockets: 160-pin IEC1076-4_xxx 2.54mm
connectors
Socket spacing (center-to-center): 0.8 inch

1

General Information

For more detailed information on the VME bus backplane, refer to the
VME Extensions Standard, VITA 1.1-199X, which can be found at
http://www.vita.com.

Safety and Regulatory Compliance

All systems integrated by Motorola meet the standards claimed for those
systems with regard to electromagnetic interference (EMI), radio
frequency interfe rence (RFI), an d overall safet y. It is possi ble, however, to
install circuit boards and drives in the MVME956AC enclosure that
produce a system not in compliance with the applicable emission limits.

Note It is the integrator’s responsibility to design a payload that

meets the desired standards.

When Motorola integrates a payload into the MVME956AC enclosure, it
is often necessary to make changes to the payload in order for the system
to pass RFI standards. The fol lowi ng is a list of conditions that in general
must be met in order to achieve compliance with RFI standards:

❏ At a minimum, the chassis must be connected to earth ground

through the safety ground wire in t he power cord to meet safety a nd
other requirements.

❏ All external I/O cables should be high-quality shielded types with

metal shell connectors.

❏ Connectors on VME modules should be metal shell types,

connected to earth ground. This is accomplished through the
conductive panels in contact with the chassis rails.

❏ All VME modules should have co nduc ti ve p anel s t o ensure a good

RF ground with the conductive chassis rails.

❏ Blank panels with EMI gaskets should be installed over all unused

chassis slots to ensure there are no RF leaks in the chassis.

1-6 Computer Group Literature Center Web Site

❏ The VME module front panel screws should be properly tightened

for good grounding.

For minimum RF emissions, it is essent ial that the foregoing con ditions be
implemented. Failure to do so could compromise the RFI compliance of
the system.

This product, as configured and shipped by Motorola, has been designed
and tested for compliance with the following RFI standards and product
safety regulations:

❏ Electromagnetic Compatibi lity: FCC class A; Eur opean CE Class A
❏ Safety: UL 1950; CSA C22.2/950; VDE EN 60 950; IEC 950

It is the customer’s responsibility to verify compliance if the customer
makes changes or additions to the "as-shipped" configuration.

General Precautions

❏ Ensure that the ai r space above and bel ow the chassis is not blocked,

and that the inlet screens and optional air filter are clean.

General Precautions

1

❏ The air inlet tempera ture must not exce ed 40 degr ees Cels ius. I f the

MVME956AC is installed in a rack with other chassis, be sure that

each chassis in the rack is provided with its own supply of fresh

cooling air. Do not use air heated by one chassis to “cool” another

chassis.

❏ All unused VME module slots must be covered to prevent cooling

air and/or RF emissions from escaping from the chassis.

❏ The chassis should be used only in a clean environment such as an

office or lab.

Operating Environment

When using tape and di sk drive units in the MV ME956AC chassis observ e
the followin g:

http://www.mcg.mot.com/literature 1-7

1

General Information

❏ This equipment is intended for use in a relatively clean environment

(office or lab). In some industrial environments, you may need to
provide addition al protection again st airborne contamina nts in order
to assure reliable operation of the floppy disk and magnetic tape
drives and media.

❏ This equipment is i ntended f or use in an enc losure co nsisting of the

front bezel togethe r wit h th e Mot orola top panel and side panels or
equivalent. Operating this equipment without a front bezel may
compromise compliance with RFI and/or product safety
regulations. It may expose the ope rator to electrica l and mechanica l
hazards.

Chassis Cooling Considerations

The system integrator must ensure that all mo dules used in the

!

Caution

system are properly cooled. The following information will
help you to determine whether the cooling is adequate.

The MVME956AC chassis is designed for an input air te mperature be low
40 degrees Celsius. Three DC-powered f ans provide f orced-air coolin g for
the power supply, mass storage enclosure, and VME modules. The
direction of air flow is: in at the bottom of the chassis, past the power
supply and VME modules, and o ut the top of the chas sis. The 24- volt fan s
deliver 81 CFM at zero inches of water. An air filter is optional.

The fans provide airf low sufficient for m ost VME modules, but some high­density, high-power modul es may require more coolin g than this enclosure
provides. When integr ating VME modules t hat are known t o be difficult to
cool, testing is advi sable to confirm that such modules are prope rly cooled.

No forced air cooling is pro vided for the rear-mou nte d module s. The rear ­mounted modules are typically transition modules with few active
components, and cooling is generally not required.

1-8 Computer Group Literature Center Web Site

Hardware Preparation

There are a number of items to check or tasks t o perfor m before yo u apply
power to the cha ssis. These items incl ude, bu t ar e not limit ed t o, the items
summarized in the following table.

Table 1-3. Hardware Preparation Items

Item Location of Instructions

VME bus backplane jumpers
Install modules User’s manual(s) for the respective

Install cables (as required) MVME956AC installation

Chassis rack mounting
Jumper options on modules used in

this chassis (as required)
For peripheral drives: Select

jumper options on disk drive(s)

Hardware Preparation

1

Chapter 4 of this manual

module(s)

instructions, also other user’s
manual(s) as applicable

Chapter 2 of this manual

User’s manual(s) for the respective
module(s)

System manual, kit instructions

http://www.mcg.mot.com/literature 1-9

1

General Information

Related Documentation

Document Title Motorola Publication

Number

MVME946 Desktop Cover Kit Installation
Instructions

MVME946 Rack Mount Kit Installation
Instructions

MVME946 Air Filter Kit Installation Instructions MVME946AFO
System Manual Module Set 68-SYSMODULE

The following VMEbus publications are available from the sources
indicated.

ANSI/IEEE Std 1014-1987 Versatile Backplane Bus:
The Institute of Electrical and Electronics Engineers, Inc.,
345 East 47th Street, New York, NY 10017, USA.
http://standards.ieee.org/

VME64 Extensions Specification, VITA 1.1-199X.
VMEbus Inte rnational Trade Association,
http://www.vita.com

MVME946CVR

MVME946RKMT

Vita 1.x Live Insertion for VME64x Requirements Standard, VMEbus
International Trade Association, http://www.vita.com

1-10 Computer Group Literature Center Web Site

Overview

!

Warning

2Chassis Mount Options

2

This chapter includes the installation instructions for the MVME956 AC
chassis. Instructions on the installation of replacement assemblies are in

Chapter 6.

Dangerous voltages, capable of causing death are present in
this equipment. Use extreme caution when handling, testing
and adjusting.

!

Caution

Unless otherwise ins tructed, perform all hardware preparatio n
and/or installation with power disconnected. Installing or
removing hardware items such as modules and cables while
power is applied may damage the equipment.

Chassis Installation Instructions

The MVME956AC chassis can be configured for either r ack mount in g or
for lab benchtop use. This section describes the steps necessary to install
the optional desktop cover on the chassis for lab benchtop use or to
rackmount your unit.

Benchtop Operation

The MVME956AC chassis can be placed on a standard table or desk for
operation as a lab benchtop unit. For this configuration, the chassis must
be equipped with the Motor ola side panels, top p anel, and disk drive cove r.
To prepare the MVME956AC for oper ation as a lab benchto p unit, follow
these steps.

2-1

Chassis Mount Options

2

Install the Desktop Cover Kit

1. The top and side panels are attached wi th bal l st ud pop-on, pop-off
catches. If the ball studs are not already installed on the chassis,
unpack the studs and threa d them into p lace in the holes pr ovided in
the top and sides of the chassis.

2. Install the side panels by positioning the ball stud catches over the
ball studs and pressing firmly inward until the catches engage.

3. Install the top panel by posit ioning the ball stud catches over the ball
studs and pressing downward until the catches engage.

Be sure the chassis is resting on a strong, level table or desk, in a clean
environment, with plenty of air space above and a round the chas sis. Refer
to Chassis Cooling Considerations on page 1-8.

2-2 Computer Group Literature Center Web Site

Chassis Installation Instruction s

If you desire to have an MVME956AC chassis with top and side panels
after previousl y having purcha sed a chassi s with out the m, ord er t he cove r
kit (MVME946CVR) referenced i n Related Documentation on page 1-10.

TOP PANEL

SIDE PANEL

BEZEL

2

SIDE PANEL

BALL STUDS

11819.00 9797

Figure 2-1. Cover Kit

http://www.mcg.mot.com/literature 2-3

Chassis Mount Options

2

Rack Mounting Option

The MVME956AC can be mounted, along with other equipment, in a
standard 19-inch RETMA (or equivalent) rack. If the chassis is equipped
with the benchtop cover kit, you must first remove it.

Cover Kit Re moval

1. The top and side panels are attached wi th ball stud pop-on, pop-off
catches. Remove the top panel by grasping the panel at the edges
and lifting it straight up from the chassis.

2. Remove the side panels by firmly grasping each pane l and pulling it
straight out from the chassis.

3. Remove the ball studs from the top and sides of the chassis.

4. Remove the disk drive cover from the front opening.

To rack mount the MVME956AC unit, you must use the optional slide
mounting kit, MVME946RKMT. Be sur e to observe and follow the special
cooling requirements explained in Chapter 1.

To rack-mount an MVME956AC chassis, follow the procedure below.

1. Install the two chassis slide sections as shown in using the binder­head screws that came in the kit. The right a nd left sections are
identical.

2. Determine where you will mount the chassis in the rack and how
much space is required for mounting. Install the rack slide rails in
the equipment rack using the binder-head screws and barnuts
supplied. The chassis can now be installed in the rack.

Note: The rack slid e rails (18- 5/8 inches) must coinci de with that o f
the chassis slide rails.

3. Align the chassis slide sections with the two rack-mounted slide
sections.

4. While depressing the loc/stop bu tt ons on t h e c hass is slide sections,
slide the chassis into the rack. Adjust the slide mounting hardware
until the chassis slides in and out smoothly.

2-4 Computer Group Literature Center Web Site

Chassis Installation Instruction s

!

Caution

5. Secure the chassis using the rear mounting bracket supplied.

2

6. Reinstall the front bezel by aligning the pop-on/off catches on the
back of the bezel wit h the ball studs on th e front panel of the c hassis.
Press firmly into place.

7. Reconnect the power cable and power-on the system.

Implementation of this procedure may invalidate product
safety (e.g., UL, CSA, etc.) and RFI regulatory compliance
(FCC, VDE).

http://www.mcg.mot.com/literature 2-5

3Operating Procedures

Overview

This chapter provides a description of the controls, indicators, and
operating procedures for the MVME956AC chassis.

System operation using this chassis is completely dependent on your
choice of hardware and software. Therefore , t he o n ly oper at ion discussed
here is a suggested basic power on/power off procedure.

Controls and Indicators

The MVME956AC chassis contains one control (switch). The switch has
an indicator (LED) that is powered by the +5 Vdc output from the power
supply. Some of the individual modules used in the chassis may also
contain controls and/or indicators. This manual describes only those that
are part of the chassis. For a description of other related controls and
indicators, refer to the documentation that came with your module(s).

3

The control provided for the MVME956AC chassis is an AC power
ON/OFF switch. With the switch in the OFF position, pow er to the
modules is removed but the primary side of the power supply remains
energized. This swit ch is located at the lower left front corner of the chassis
and provides a convenient means of powering the chassis up and down.

3-1

Operating Procedures

Power Control Procedure

A suggested power-on procedure for the chassis is as follows:

3

1. Ensure that all modules and cabling are properly configured and
installed. Also check that all required external cabling (to
peripherals) is correctly installed.

2. Plug in the AC line cord (at the rear of the chassis) and connect the
cord to an AC power source.

3. Set the power switch at the front of the chassis to (ON). The power
supply cycles up and the cooling fans immediately come on.

4. Power up any peripheral equipment int erfaced to the chassis that has
its own power on/off switch.

A suggested power-off sequence for the chassis is as follows:

Note Ensure that proper soft ware s hutdown proce dures hav e been

executed before you continue.

1. Power down any peripheral equipment interfaced to the chassis that
has its own power on/off switch.

2. Set the power switch to OFF. The power supply cycles down, and
the cooling fans stop running. For the AC chassis only, the power
supply fan will continue to run.

3-2 Computer Group Literature Center Web Site

412-Slot VMEbus Backplane

Overview

This chapter provides a physical and electrical description of the 12-slot
VME bus backplane used in the MVME956AC chassis. Refer to Chapter

1 for features and specifications of the backplane. Refer to Chapter 6 for

removal and replacement procedures.

Physical Description

The backplane was designed to accommodate VME modules and disk
drive units. It accommodates up to 12 double-high user VME modules
containing both P1 and P2 connectors. The backplane is fully assembled
with connectors and terminators. It contains:

❏ 12 connectors on the top row to receive connector P1 of the VME

modules

4

❏ 12 connectors on the bottom row to recei ve VME module expansion

connector P2

Backplane Power

VME modules that plug into the backplane require voltages of +5 Vdc,
+12 Vdc, and -12 Vdc for operation. The MVME956AC chassis contains
a power supply and wiring that provide these voltages to the backplane.

The power connectors cha ra cteristics and the number and arrangement of
their pins are summarized in Figure 4-1 on page 4-4.

4-1

12-Slot VMEbus Backplane

Backplane Bus Connectors

All rows of J101 through J112 (Z, A, B, C, D) are interconnected acr oss all
12 slots, which provides the required signals for A24/D16 operation.

The center row (B) of J201 through J212 is interconnected across all 12

4

slots, which provides the required signals for extended operation
(A32/D32).

Rows A and C of J201 through J212 are not interconnected, but are
available for I/O functions or expansion bus operation.

VME64x Bus Interface Signal Termination

Signal lines are termi nated with active terminati on. For further information
on bus termination a nd VME64x bus backpl ane specifi cations, refe r to the
VME64 Extensions Specification, VITA 1.1-199x.

4-2 Computer Group Literature Center Web Site

Backplane Preparation

The chassis is ship ped from th e fact ory with the backpl ane f ully e quippe d
with sockets (VME64X bus connectors), power connectors, and bus
terminator resistor networks. No special preparation or preassembly is
required prior to use.

You must configure the VME64X bus daisy-chain jumpers on the rear
(wire side) of the backplane. Refer to VITA 1.x Live Insertion for VME64x
requirements stan dard for more electrical detail and information on daisy­chain jumpering.

Note Backplane daisy-chain jumpers normally are shipped with

the chassis. If necessary, additional jumpers can be ordered
from Motorola.

Backplane Preparation

4

http://www.mcg.mot.com/literature 4-3

12-Slot VMEbus Backplane

J1

- V2 + V1 +3. 3V +3. 3V +3. 3V +3. 3V- V1

PB1 PB2 PB4 PB5 PB6 PB7 PB8

J112

+ V2
PB3

J107J111 J110 J109 J108 J106 J104 J103 J102

J105

J3

Row 1

J2

J101

4

SLOT 12

SLOT 11

SLOT 10

SLOT 9

SLOT 8

SLOT 7

SLOT 6

SLOT 5

SLOT 4

SLOT 3

SLOT 2

J14

J13

J12

J11

J10

J9

J8

J7

J6

J5

J4

+5V

+5V

GND

+5V

+5V

+5V

+5V

+5V

GND

+5V

PB16

PB17

GND

PB25

PB26

PB9

-12V

+12V

PB10

PB11

PB12

PB13

PB14

PB15

GND

GND

GND

GND

GND

PB18

PB19

PB20

PB21

PB22

GND

PB23

PB24

Row 2

Row 3

GROUND

J212 J207J211 J210 J209 J208 J206 J204 J203 J202 J201J205

+3. 3V

+3. 3V

GND

VR1

PB27

PB28

PB29

GND

PB30

GND
PB31

GND

PB32

+5V

PB33

+5V

PB34

+5V

PB35

VR2

Row 4

11864.00 9709

Figure 4-1. 12-Slot Backplane Connectors and Headers

Rear View

4-4 Computer Group Literature Center Web Site

Install the Daisy-Chain Jumpers

All daisy-chain li nes of the VME64x bus ca n be se parat ely byp assed with
removable shorting jumpe rs on every conn ector socket. Shor ting the inpu t
to the output of the daisy-chain signals is required if the daisy-chains are
in use, and if a VME64x module design does not provide for the
propagation of the daisy-chain.

For instance, if a backplane slot contains a device module designed for
daisy-chain signal propagation, no jumpers are req uired on the jumper pins
for that slot. However, all empty slots, and slots containing modules
without this c apability, must ha ve daisy-chain jumpers insta lled to provide
propagation of these signals.

Daisy-chain bypass jumper areas are provided on the rear side of the
backplane. For an illustr ation of the bac kplane daisy-cha in jumper wiring,
see Figure 4-2 on page 4-8.

The following procedure is suggested for installing the jumpers:

1. Attach an ESD strap to your wrist. Attach the other en d of the ESD
strap to the chassis as a ground. The ESD strap must be secured to
your wrist and to ground throughout the procedure.

Install the Daisy-Chain Jumpers

4

2. Perform an operating system shutdown. Turn the AC or DC power
off and remove the AC cord or DC power lines from the system.

3. At the rear of the backplane, select the row(s) of header pins that
require jumpers. Any backplane slot that will not be occupied by a
VME64x module requires jumpers on the rear backplane pins to
propagate the Bus Grant (BG) and Interrupt Acknowledge (IACK)
signals to the ne xt VME64x module slot. See Figure 4-1 on page 4-4
and Table 4-2 on page 4-7.

For example: If a VME64x module is used in all slots except slots
J103 and J106, jumpers must be inst alled on the BG and IACK pins
associated with those slots. (The pins that must be jumpered are the
ones located immediately to the left of the module slot, J4 through
J14, depending on the slot, when viewed from the rear of the
backplane.) In this case, the following pairs of header pins would
require jumpers:

http://www.mcg.mot.com/literature 4-5

12-Slot VMEbus Backplane

– Row of pins, left side of slot J103 - BG0, BG1, ...
– Row of pins, left side of slot J106 - BG0, BG1, ...
Carefully align the jumper(s) on the correct pair of pins to be

jumpered and gently push until the top of the jumper is flush with
the top of the pins.

4

4. Continue in this fashion, placing jumpers on all pairs of pins for
each backplane slot th at will not be occupie d by a VME64x module.

Pin Assignments

Power Monitor Connection

Connectors J1 and J3 provide for the power monitor signals ACFAIL,
SYSFAIL and SYSRESET. They have the following pinouts.

Table 4-1. Power Monitor Connection

Pin Assignment for J1 Connector Pin Assignment for J3 Connector

J1-1 GND J3-1 ACFAIL
J1-2 NC J3-2 SYSFAIL
J1-3 SYSRST J3-3 SYSRST
J1-4 NC J3-4 GND
J1-5 SYSFAIL
J1-6 NC
J1-7 ACFAIL
J1-8 NC
J1-9 +5V
J1-10 NC

For the location of these connectors, see Figure 4-1 on page 4-4.

4-6 Computer Group Literature Center Web Site

Live Insertion

Install the Daisy-Chain Jumpers

Sockets J4-J14 allow t he dai sy-ch ained b us gra nt arb itrati on and i nterr upt
priority resolu tion processes to continu e unaffected during live insertion or
removal. These sockets, in conjunction with the headers for bus grant
signal jumpers and the he aders f or IACK sig nal jumpe rs can be used wit h
a user-supplied daisy-chain switch module. This switch module
incorporates the backplane daisy-chain bypass circuits.

Table 4-2. Live Insertion Connections

Sockets J4 through J14

Pin 1 +5V
Pin 2 LI/O
Pin 3 GND

NOTE: All jumper pins in slots that use the live insertion must be
removed before installing a user-supplied daisy chain switch module.

Header J2 can be used to monitor IACK signal on both pin 1 and pin 2.
For further information, refer to the VITA 1.x Live Insertion for VME64x

requiremen ts standard.

4

http://www.mcg.mot.com/literature 4-7

12-Slot VMEbus Backplane

TERMINATION

CARD SLOT

D32

4

C32
B32
A32
Z32

D32
C32
B32
A32
Z32

D32
C32
B32
A32
Z32

BACKPLANE

DIRECTION OF

PROPAGATION

VIEWED FROM

REAR SIDE OF

DAISY-CHAIN

22

IACKOUT

ACTIVE

20

21

SHUNT PLUG

IACKIN

IACK

(JUMPER)

REMOVABLE

10

8

9

BG2OUT

BG3OUT

BG2IN

BG3IN

PIN

4115

6

7

D1
C1
B1
A1

Z1

D1
C1
B1
A1

Z1

BG0OUT

BG1OUT

BG0IN

BG1IN

D1
C1

J102 J101J112 J111

B1
A1

Z1

D1
C1
B1
A1

Z1

4115

2114 9710

D32
C32
B32
A32
Z32

20

21

22

TERMINA T ION

ACTIVE

10

6

7

8

9

BUS GRANT

Figure 4-2. Backplane Daisy-Chain Jumper Wiring

4-8 Computer Group Literature Center Web Site

5Removal and Replacement

Overview

Procedures

This chapter provides recommended procedures for the removal and
replacement of MVME956AC chassis major assemblies. For
identificatio n and location of the assemblies an d par ts mentioned in these
procedures, refer to the drawings and parts lists in Chapter 7.

The removal/replacement procedures are organized and presented in the
following order:

❏ Power Supply
❏ Disk and Tape Drive
❏ VME64x Bus Backplane
❏ Cooling Fan(s)
❏ Optional Air Filter Kit

5

Following ESD and Safety Procedures

Use ESD

Wrist Strap

Motorola strongly re commends that you use an antist atic wrist stra p and a
conductive foam pad when installing or upgrading the system. Electronic
components, such as d isk dr ives, c omputer boards , and memor y modules ,
can be extremely sensitive to ESD. After removing the component from
the system or its protective wrapper, place the component flat on a
grounded, static-free surface, and in the case of a board, component-side
up. Do not slide the component over any surface.

If an ESD station is not available, you can avoid damage resulting from
ESD by wearing an antistatic wrist strap (available at electronics stores)
that is attached to an unpainted metal part of the system chassis.

5-1

Removal and Replacement Procedures

Turn the system’s power off before you perform these procedures. Failure to

!

Warning

5

turn the power off before opening the system can result in personal injury or
equipment damage. Hazardous vol tage, current, and energy lev el s ar e present
in this product. Power switch terminals can have hazardous voltages present
even when the power switch is off. Do not operate the system with the cover
removed. Always replace the cover before turning on the system.

Prior to performing any of the following installation or removal
procedures, follow these steps.

1. Attach an ESD strap to your wrist. Attach the other en d of the ESD
strap to the chassis as a ground. The ESD strap must be secured to
your wrist and to ground throughout the procedure.

2. Perform an operating system shutdown. Turn the AC or DC power
off and remove the AC cord or DC power lines from the system.

Power Supply

The suggested procedure for the removal and replacement of the power
supply assembly is as follows:

Removal of the power supply provides access to high

!

Warning

voltages. Ensure the powe r cord is removed from the power
supply. Allow one minute for the capacitors in the power
supply to discharge.

Removal

1. Turn the power OFF to all equipment and disconnect the power
cable from the AC power source.

2. If the MVME956AC chassis is rack mounted, slide it from the rack ,
or if it is a lab benchtop unit, remove the top panel and right side
panel.

5-2 Computer Group Literature Center Web Site

Power Supply

3. Remove the screws holding the top cover to the chassis and remove
the top cover.

4. Remove the power supply mounting screw from the right sid e of the
chassis. Remove the additi onal scr ews fro m the back of the chas sis.

5. Disconnect the cable assemblies from the power s upply or f rom the
backplane, if access to the power supply connections is difficult.

6. Disconnect the +5V, +12V, -12V, and RTN wires from the
connections on the power supply.

7. Slide the power supply assembly vertical ly up and out of the ch assis.

5

http://www.mcg.mot.com/literature 5-3

Removal and Replacement Procedures

5

Figure 5-1. Power Supply Removal/Replacement

Replacement

To replace the power supply as sembly or to install an exchanged as sembly,
follow these procedures.

1. Slide the power supply assembly vertically back into the chassis.

2. Reconnect the +5V, +12V, -12V, and RTN wires disconnected in

Step 6.

5-4 Computer Group Literature Center Web Site

Power Supply

3. Reconnect the cable assemblies removed in Step 5 above to the
power supply or backplane.

4. Reinstall the power supply mounting screw from the side of the
chassis. Reinstall the screws you removed from the back of the
chassis in Step 4 above.

5. Replace the chassis’ top cover with the screws removed in Step 3

above.

6. Slide the MVME956AC chassis back into its rack mounting or
reinstall the top and side panel on your lab benchtop unit.

5

http://www.mcg.mot.com/literature 5-5

Removal and Replacement Procedures

Disk and Tape Drive

To remove and replace disk and/or tape drives, follow these procedures.

Removal

1. Turn the power OFF to all equipment and disconnect the power
cable from the AC power source.

5

2. Slide the MVME956AC chassis out from it s rack mounting r emove
the top panel and the side panel nearest the drives.

3. Remove the front bezel.

4. Loosen the screws that engage the keyhole slots in the right side
access cover. Lift the cover up and off the screws.

5. Remove the screws on either side of the drive and partially pull the
drive out of the chassis. Disconnect the data and power cables.
Remove the drive from the chassis.

6. Remove the screws connecting the drive mount bracket to t he drive.
Note: If this is a permanen t removal, ensure that t he remaining drive

identifications are correct and the terminating resistor is properly
installed.

7. If the drive is to be immediately replaced, go on to th e repla cement
procedure at this point.

8. Position the side access cover on the screws to engage the keyhole
slots properly. The washers must be on the outside of the cover.

9. When the screws have properly engaged the keyhole slo ts, slide the
cover down and tighten the screws.

10. Replace the front bezel.

11. Slide the MVME956AC chassis back into its rack mounting or
replace the side panel and the top panel to your lab benchtop unit.

5-6 Computer Group Literature Center Web Site

Disk and Tape Drive

11823.00 9708

5

Figure 5-2. Disk/Tape Drive Removal

Replacement

1. Follow the replacement procedure in the installation instructions
that came with your drive.

Note: Use the short ( 1/4 inch long) screws to a tt ach the brackets to
the drive. The longer sc rews may damage the drives. Ensur e that all
drives are properly identified and that the terminating resistor is
installed or removed as applicable.

2. Reconnect the power and data cables.

3. Position the side access cover on the screws to engage the keyhole
slots properly. The washers must be on the outside of the cover.

4. When the screws have properly engaged the keyhole slo ts, slide the
cover down and tighten the screws.

http://www.mcg.mot.com/literature 5-7

Removal and Replacement Procedures

5. Replace the front bezel.

6. Slide the MVME956AC chassis back into its rack mounting or
replace the side panel and the top panel to your lab benchtop unit.

To reset the ju mper address es, refer to the installation instructions that
came with your drive.

5

5-8 Computer Group Literature Center Web Site

VME64x Bus Backplane

To remove or replace the backplane used in the MVME956AC chassis,
follow these procedures.

Removal

1. Turn the power OFF to all equipment and disconnect the power
cable from the AC power source.

2. Remove all external cabling connected to modules installed in the
chassis. Then remove all modules installed in the chassis.

3. Slide the MVME956AC chassis out from its rack mounting or
remove the top panel of your lab benchtop unit.

4. Remove the screws holding the top cover to the chassis and lift off
the top cover.

5. For better access to the backplane, you may remove the rear card file
subassembly from the rear of the chassis by removi ng the screws on
the left and right sides of the card file.

VME64x Bus Backplane

5

6. Remove all internal cables connected at the rear of the backplane.

7. Remove all power wires from the rear of the backplane.
Note: Mark the wire locations carefully so they can be correctly

reinstalled. Inc orrect connection of the se wires can cause damage to
the equipment.

8. Disconnect the bus bar’s ground and +5V by removing the screws

that attach it to the backplane.

9. Disconnect the stiffener bar from the chassis by removing the two
screws located o n the le ft si de of the c has sis. T hen, re move the two
screws on the right sid e of the chassis by accessing t hrough the drive
cable access panel.

10. Loosen and remove the two rows of screws that secure the
backplane to the chassis frame members. Then remove the
backplane.

http://www.mcg.mot.com/literature 5-9

Removal and Replacement Procedures

11. Now remove the stiffener from the backplane by removing the
screws from the front of the backplane. Note that the adhesive
associated with the insulating tape on the stiffener may make the
removal of the stiffener from the backplane somewhat difficult.
Take caution to prevent damage to the backplane when prying the
stiffener off.

5

11869.00 9710

Figure 5-3. Backplane Mounting (Card File Removed)

5-10 Computer Group Literature Center Web Site

Replacement

VME64x Bus Backplane

1. Attach the stiffener to th e backplane with the screws removed in

Step 11 above.

2. Position the backplane with the J1 and J2 connectors toward the
front of the chassis.

3. Attach the backplane to the chass is frame members wi th the sc rews
removed in Step 10 above.

5

4. Attach the ends of the stiffener to the chassis using the screws
removed in Step 9 above.

5. Attach the ground bus bar to the backpl ane with the screws remove d
in Step 8 above.

6. Connect all power wires removed in Step 7 above.

7. Connect all cables removed in Step 6 above to the rear of the
backplane.

8. Slide the card file back into position and attach with the screws
removed in Step 5.

9. Install the modules removed in Step 2 above.

10. Replace the top cover of the chassis with t he screws removed in Step

4 above.

11. Slide the MVME956AC chassis back into its rack mounting or
reinstall the top panel on your lab benchtop unit.

12. Connect all external cabling removed in Step 2 above.

http://www.mcg.mot.com/literature 5-11

Removal and Replacement Procedures

Cooling Fan

To remove or replace one or more of the chas sis cooling fans, foll ow these
procedures.

Removal

1. Turn the power OFF to all equipment and disconnect the power

5

cable from the AC power source.

2. Slide the MVME956AC chassis out from its rack mounting or
remove the top panel and side panels of your lab benchtop unit.

3. Remove the front bezel.
Note: Refer to Figure 7-1 on page 7-5 and Ta ble 7-2 on page 7-4 for

parts identification and location.

4. At the left and right side of the chassis, remove the three screws
along each side of the base which hold the hinged fan tray and air
filter door in the chassis.

5. If the MVME956AC is not mounted in a rack, lay the unit on one
side.

6. Remove the screws that keep the f an tray and ai r filt er door secured.

7. Swing the fan tray and air filter door open.

8. Depending on the fan you are repl acing, unplu g the app ropri ate f an
wire connector from its mating connector.

See the wiring diagram in Figure 7-3 on page 7-7.

9. Using a nut driver, remove the nuts and screws that secure the f an to
the tray.

10. Remove the fan.

5-12 Computer Group Literature Center Web Site

Cooling Fan

5

Figure 5-4. Cooling Fan Removal/Replacement

http://www.mcg.mot.com/literature 5-13

Removal and Replacement Procedures

Optional Air Filter Kit

If you are using the optional air filter (MVME946AFO) and wish to
replace it, re fer to Related Documentation on page 1-10 for i nformation on
the Air Filter Kit.

Replacement

5

1. Attach the new fan to the fan tray with the screws removed in Step

9 above.

2. Plug the appropriate fan wire connector into its mating connector.

3. Rotate the fan tray and air filter door back into place and secure
them with the screws removed in Step 4 and Step 6 of the removal
procedure. Set the unit upright if it is not mounted in a rack.

4. Reinstall the front bezel.

5. Slide the MVME956AC chassis back into its rack mounting or
reinstall the top panel and side panels on your lab benchtop unit.

5-14 Computer Group Literature Center Web Site

6Support Information

Introduction

This chapter provides parts lists, wiring diagram, and assembly drawings
for the MVME956AC chassis. For information concerning drawings and
parts lists for power supplies and mass storage units used in this chassis,
refer to their respective manuals or reference sheets.

Drawings/Wiring Diagram

Chassis assembly drawi ngs for the M VME956AC c hassis are p rov ided i n
this chapter. A chassis wiring diagram is included as part of the main
assembly drawing of the chassis. These drawings represent the latest
design at the time of prin ting. Occasional ly, minor component cha nges are
made at the factory. Therefore, when replacing defective components or
parts, always use the same value as the defective part, even though the
diagram or drawing may indicate a different value or type.

6

6-1

Support Information

Pa rts Lists

Parts lists are provided for the MVME95 6 c has sis major assemblies. This
list reflects the latest iss ue of hardware at the time of pri nting. The pa rts
list for the main chassis is p rovided below. The parts list for the major
assemblies is in Table 6-2 on page 6-4. The main asse mb ly parts location

.

6

is illustrated in Figure 6-1 on page 6-5

Table 6-1. MVME956AC Chassis Parts List

COMPONENT DESCRIPTION

27-W5328C01x Chassis assembly
01-W1631B02x Bezel assembly, 956
01-W2030E01x AC power supply
01-W2287D01x Assy fan, 24V Cholla+
01NW9804E44 Backplane assy, 1 2-slot, VME ext
07-W5215C01x Access cover, left side
07-W5224C01x Access cover, right side
07-W5225C01x Card cage
07-W5329C01x Cover, 956
07-W6858B01x SCSI cable cover
07-W5331C01x Stiffene r, 956 motherboard
07-W6907B01x Fan guard, Cholla+
07NW9502A96 Guard, 20x20mm, SW
30-W2285D02x Power cable harness assembly
30-W2297D02x DC harness,+2V MNFR.
30-W2295D03x Cable assembly, switch/enable, AC unit
30-W2296D03x Harness assembly, DC harness/enable
31-W5330C01x Bus bar, 956 motherboard
33-W6414B01x Voltage warning label
33-W4120C01x Label enclosure, US
33-W6862B02x Label enclosure, universal
64-W4211B01x BDL, 1 wide

6-2 Computer Group Literature Center Web Site

Table 6-1. MVME956AC Chassis Parts List (Continued)

COMPONENT DESCRIPTION

64-W4727C01x Front panel blanks
13-W6275B01x Brk, mld dr flr
42NW9401A80 Mount, push cable tie
42NW9401B28 Tywrap, nylon,L3-7/8,B3/4
42NW9401B33 Retainer, tywrap, self-adhesive
42NW9401B35 Tywrap, nylon, L7-3/8,B1-7/8
75NW9402A32 Foot, round
29NW9805A83 Lug, quick connect, .250 w/blde
29NW9805B17 Jumper, insulated shorting
29NW9805B34 Terminator, .187"X.02" quick connect
29NW9805B38 Lug, quick connect, .187" w/blde
04NW9005A60 Flat washer, FLT, #10
03NW9004B48 Captive Screw, m2.5
03SW990F608 Sem, Phillips
03SW990F012 Sem, Phillips panhead, 10-32X3/4"
03SW990F604 Sem, Phillips panhead, 6-32X1/4"
03SW990F606 Sem, Phi llips panhead, 6-32X3/8"
03SW990F626 Sem, Phillips, 6-32X1-5/8"
03SW990F806 Sem, Phillips panhead, 8-32X3/8"
03SW991F604 Screw, Phillips flathead, 6-32X1/4"
03SW993D212 Screw, Phfil, M2.5X.45X 12SCYI
02SW995E005 Nut, hex 10-32
02SW999E002 Nut, hex 6-32

Parts Lists

6

http://www.mcg.mot.com/literature 6-3

Support Information

Table 6-2. MVME956AC-AC Major Assemblies

Model Part

Number

MVME956­AC

--- 01­W2030E01X

6

--- 01­NW9804E44

Common
Name

Chassis
assy

Power
supply

Backplane VMEmodule backplane. Contains

Description

Chassis with card cage, power
supply, backplane, power switch,
and cooling fans. Operates on
115/220 Vac input power .

Power supply, 550W, 115/ 230 Vac
input (+5 Vdc, +12 Vdc, and -12
Vdc). Includes cooling fan and
housing with cables.

12 connectors for P1 and P2 of
VME bus.

6-4 Computer Group Literature Center Web Site

Top Cover

PWB Assy.

12-slot

Voltage Warning

Label

Stiffener

Power Supply
Assembly

Parts Lists

Front Panel.

blank

6

BDL. 1 wide

Cable Assy

Switch/Enable

Bezel Assembly

Cable Assy. DC

Access Cover

Foot

harness/enable

Right Side

Access Cover

Left Side

Chassis

Assembly

Fan Assembly

Figure 6-1. MVME956AC Chassis Assembly, 1 of 2

Card Cage

SCSI Cable Cover

11877.00 9710

http://www.mcg.mot.com/literature 6-5

Support Information

Chassis Top Cover

Access Cover

6

AIR FLOW

Fan Assembly

Right Side

Filter Door

Fan & Filter Frame

Fan Guard

Optional
Air Filter

11876.00 9710

Figure 6-2. MVME956AC Chassis Assembly, 2 of 2

6-6 Computer Group Literature Center Web Site

Row 1

Parts Lists

ORG/+12V
BLK/GND
RED/+5V

Row 2

PB

8

PB

7

PB

6

PB

5

PB

4

PB

3

PB

2

PB

1

+12V

-12V

PB
11

PB
10

PB

9

Row 3

Row 4

PB
35

+5V

PB
34

+5V

GND

GND

PB
11

GND

PB
19

PB
18

PB
33

PB
32

GND
PB

31

PB
30

PB
29

PB
28

PB
27

BLK/GND

ORNVIO

J11-A

J11-B

J11-C

P11

P11

P11

TO DRIVES

FAN

FAN

FAN

FAN

POWER SUPPLY

RED

NC

WHT

BLK/WHT

RED/WHT

BLK

RET

RET +5V

+12V-12V

VIO F4

BLK F6

ORG F5

6

J1

T2
RED

T1
BLK

J14

FRONT PNL SWI TC H

SIG RTN
INHB
PWR GD/LED DRV

ASSY. POWER
SUPPLY
01-W2030E01A

RED / WHT
BLK / WHT

BLK
WHT
RED

RED / WHT

BLK / WHT

2115 9710

Figure 6-3. MVME956AC Wiring Diagram

http://www.mcg.mot.com/literature 6-7

Index

A

A24/D16 operation 4-2
A32/D32 operation 4-2
ACFAIL 4-6
air cooling 1-3, 1-8
air filter door 5-14
air filter, optional 1-8
assemblies

backplane 1-2
chassis 1-2
power supply 1-2

assembly drawings 6-1

B

backplane

bus connectors 4-2
physical description 4-1
power output 4-1

preparation 4-3
backplane description 1-5
backplane power 1-3
benchtop co ver kit, ordering 2-3
BG pins 4-5
bus termination 4-2

C

chassis

components 1-2

controls and indicators 3-1

cooling 1-8

documentation 1-10

features 1-1

installing 2-1

major assemblies 1-2
operating environment 1-8
power supply 1-3
regulatories 1-6
setup precautions 1-7
specifications 1-3
use and purpose 1-2

chassis assemblies, removal and replacement

5-1

control switch, location 3-1
cooling requirements 1-8
cover kit, installation 2-2
cover kit, removal 2-4

D

d SYSRES 4-6
daisy-chain

configure jumpers 4-3
install jumpers 4-5
jumper bypass 4-5
jumper wiring 4-8
jumpering 4-5
shorting the input to output 4-5
signal propagation 4-5

switch module 4-7
drive brackets, install 5-7
drives, optional 1-3

E

ESD procedures 5-1
Eurocard panels 1-3
expansion bus 4-2
extended operation 4-2

IN-1

Index

N
D
E
X

F

front panel, description 1-3

safety 5-1
to rack mount 2-4

publications, related 1-10

H

hardware issue 6-2
hardware preparation 1-9

I

I/O functions, backplane connectors 4-2
IACK pins 4-5
install drive brackets 5-7
installation instructions 2-1

L

live insertion 4-7

M

manual overview 1-1
module support 1-3
mounting, benchtop 2-1
mounting, rack 2-4

O

operating environment 1-8
ordering jumpers 4-3
overview of manual 1-1

P

parts list

chassis assemblies 6-2
for subassemblies 6-1

main assembly 6-2
pin assignments 4-6
power monitor connections 4-6
power supply

description 1-2, 1-4

I

limits 1-4
preparation of backplane 4-3
procedures

benchtop operation 2-1

install jumpers 4-5

power control 3-2

power-off 3-2

power-on 3-1

R

rack mount, slide mounting kit 2-4
remove/replace AC power supply 5-2 to 5-5
remove/replace backplane 5-9 to 5-11
remove/replace cooling fan 5-12 to 5-14
remove/replace drives 5-6 to 5-8
RF emissions, precautions 1-7
RFI compliance 1-7, 1-8
RFI standard 1-6

S

safety procedures 5-1
SCSI drive specifications 1-3
setting up the chassis 1-7
signal line termination 4-2
SYSFAI 4-6
system operation 3-1
system shutdown 5-2

T

temperature requirements 1-7
terminating signal lines 4-2

U

using tape and disk driv e un its 1-7

V

VME modules and backplane 4-1
VME64x requirements standard 4-3
VMEbus backplane

description 1-5
VMEmodule specifications 1-3
voltage requirements, backplane 4-1

W

wiring diagram 6-1

IN-2 Computer Group Literature Center Web Site